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Monitoring for brown marmorated stink bug in Ontario corn and soybean

Principal Investigator

Tracey Baute

Research Institution

Ontario Ministry of Agriculture, Food, and Rural Affairs (OMAFRA)

External Funding Partners

OMAFRA/University of Guelph Research Partnership – Emergency Management

Project Start

April 2015

Project End

March 2018


  • To continue monitoring in Ontario corn and soybean fields and high risk introduction sites in efforts to succeed in early detection of brown marmorated stink bug (BMSB) and proactive implementation of management strategies in field crops if needed.


  • The development of an early detection system to monitor brown marmorated stink bug (BMSB) has led to a greater understanding of their spread and the establishment of overwintering sites.
  • The education of corn and soybean producers, agricultural representatives, consultants, homeowners and citizen scientists on proper identification of BMSB will increase awareness and improve identification of overwintering sites and aid detection of this new invasive species.
  • The early detection system for monitoring BMSB is important to ensure that growers are alerted if BMSB moves into agricultural areas and able to respond if management is required to protect yield and quality of their crop.

Scientific Summary

Brown marmorated stink bug (BMSB; Halyomorpha halys Stål) is an invasive pest from Asia. It was first detected in Pennsylvania in 2001 and has since spread to 41 states and two provinces, including Ontario and Quebec. BMSB has become a significant pest of several host crops in the Mid-Atlantic US, including corn and soybeans. Current research efforts in the mid-Atlantic US indicate that there is a significant risk of substantial yield loss within the first 40 feet of corn and soybean fields. Preliminary results from indicate a potential yield loss of up to 40 bu/ac within the first 40 feet of row in soybeans if populations reach one stink bug per foot of row, which is the current threshold for other stink bugs in soybeans in Ontario and other jurisdictions. Early detection is critical for management strategies to be implemented before Ontario corn and soybean producers experience significant yield loss.

This project aims to monitor and document the continued spread of BMSB continuing with the protocol developed in the 2012-2014 survey. Sampling will be biased to agricultural areas considered at high risk, near known established breeding populations or those with prior confirmed homeowner finds. In each of the two survey years, surveys will consist of visual sampling, sweep nets, and pheromone traps in urban and natural sites, transportation corridors and agricultural crops. Visual inspection will be performed on all potential plant hosts surveyed. At each site, any stink bug (indigenous or exotic) nymphs, adults, and egg masses found will be collected in order to catalog the native and exotic species that exist in the habitats described above. In corn and soybeans growing regions, monitoring will extend across counties in southern Ontario.

This project is a continuation of the project titled, “Brown marmorated stink bug monitoring for Ontario” (2012 – 2015).

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